#find.py
class1 = ['zhangsan','lisi','wangwu','zhaoliu']
print('there are {} student in this class:'.format(class1.__len__()))
traverse(class1)

i = class1.index('lisi')
print("lisi's index is {}".format(i))
i = class1.count('lisi')
print("lisi' times is {}".format(i))

i = class1.remove('lisi')
traverse(class1)